A-site substitution in Fe1.1Te:
synthesis, structure and properties
Chem.
Met. Alloys 3
(2010) 155-160
https://doi.org/10.30970/cma3.0151
S.M. KAZAKOV, V.V. BELIKOV, A.V.
SADAKOV, O.E. OMELYANOVSKII
The solid solutions Fe1.1-xMxTe (M =
Ni, Co) have been synthesized in sealed quartz tubes. We observed a systematic
shift of the lattice parameters for both systems till x = 0.1, then a secondary phase with NiAs-type
structure appeared. For the Co-substituted samples we found a significant
decrease of the c-parameter, while
the variation of the a-parameter was
negligible. For the Ni-doped samples the a-parameter
slightly increases and the c‑parameter
decreases with increasing Ni content. Magnetic measurements showed almost
linear dependence of the magnetic susceptibility for (Fe0.9Ni0.1)1.1Te
in the T = 4-60 K range.
The magnetic susceptibility of (Fe0.9Со0.1)1.1Te exhibits a maximum around
25 K, indicating an antiferromagnetic
transition. No superconductivity was observed in Fe1.1-xMxTe (M =
Ni, Co) down to 4 K.
Variation of the lattice parameters as a
function of the dopant content for Fe1.1-xMxTe (M =
Ni, Co).
Keywords
Iron chalcogenides /
X-ray diffraction / Crystal structure